JPH043561Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a solar power generation device that receives sunlight to generate electricity, and particularly relates to preventing snow from accumulating on the power generation device.

[Prior art and its problems]

Conventionally, power generation devices that use sunlight have become widely used in areas where commercial power sources are not available, but in snowy areas, if there is snow on the receiving surface of the power generation device, the power generation device can output only 1 cm of snow. Since the amount of snow falls below 50% and it no longer functions as a solar power generation device, it is necessary to remove the snow manually or wait for it to fall naturally, which is a major obstacle to the widespread use of solar power generation devices in snowy areas. Ta.

For this reason, it has been proposed to set the solar panel at a steeper angle or to rotate the panel due to snow accumulation, but changing the installation angle will reduce the sunlight collection efficiency and also cause the panel to rotate. The problem is that a large amount of energy is required for rotation.

An object of the present invention is to provide a solar power generation device that solves this problem, prevents snow from accumulating on solar cell panels, and improves the output of solar cells.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention includes a solar cell for power generation, a storage battery charged by the solar cell, a heater placed close to the solar cell, and a control circuit for controlling energization of the heater. A solar power generation device comprising a current detection means for detecting a charging current between the solar cell and the storage battery, and a sensor solar cell is provided with its light-receiving surface facing downward, and the output of the sensor solar cell is and when the current detecting means detects a decrease in the charging current, the control circuit is configured to energize the heater.

[Effect]

By configuring the solar power generation device as described above, sunlight is reflected by the snow on the road due to snowfall and enters the solar cell for the sensor, which has a light-receiving surface below, and the solar cell generates an electromotive force. At this time, since the light-receiving surface of a solar cell having a light-receiving surface facing the sun and disposed for power generation is also covered with snow, the output current of the solar cell for power generation decreases.

At this time, both outputs operate the control circuit and energize the heater.

Therefore, snowfall can be reliably detected and the heater can be controlled, resulting in an efficient solar power generation device.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings. FIG. 1 is a block diagram showing an embodiment of the solar power generation device of the present invention, and FIG. 2 is a side view of the solar power generation device of the present invention.

In Fig. 1, reference numeral 1 denotes a solar cell for power generation. A plurality of solar cells 1 are arranged with the sun side as a light receiving surface, and the power generated by receiving sunlight is transferred to a storage battery 2.
Electrical wiring is provided to charge the battery and supply it to the load 3.

Reference numeral 4 denotes a heater, which is disposed near the solar cell 1 and is arranged so that when the heater 4 is energized, snow that has fallen on the light receiving surface of the solar cell 1 is removed by the heat of the heater 4. Reference numeral 5 denotes a control circuit, which controls the energization switch 6 to flow a heating current to the heater 4.

Reference numeral 7 denotes a solar cell used as a sensor, which is arranged with its light-receiving surface facing downward, and its output is input to the control circuit 5. Reference numeral 8 denotes a current detection circuit, which detects the charging current from the solar cell 1 to the storage battery 2 . The control circuit 5 reduces the charging current by the current detection circuit 8 and the solar cell 7
When an output occurs, the switch 6 is turned ON.

FIG. 2 is a side view of the solar power generation device of the present invention, and the operation of the present invention with the above configuration will be explained using this figure.

The solar cell 1 for power generation is installed with the sun S side as its light receiving surface, while the solar cell 7 constituting the snow detection means is installed with its light receiving surface facing downward.

When there is no snow, the solar cell 1 receives sunlight and generates power, but the solar cell 7 does not generate power, so the control circuit 5
does not operate and the heater 4 is not energized.

When it becomes snowy, the output power of the solar cell 1 decreases, and therefore the charging current also decreases.

On the other hand, due to snow accumulation on the road surface, sunlight is reflected and enters the solar cell 7, as shown in FIG. 2, to generate electric power. At this time, even if there is snow, since the solar cell 7 has its light-receiving surface facing downward, there will be no obstruction and power will be generated. Therefore, the control circuit 5 operates, the heater 4 is energized, and the snow accumulated on the solar cell 1 can be removed by the heater 4. When the snow on the solar cell 1 disappears, the control circuit 5
Since it does not operate, there is no wasted power consumption.

[Effect of idea]

As described above, the present invention uses reflected light generated by snow accumulation as a sensor to detect solar cells to control the heater, making it possible to quickly detect snow accretion on solar cells for power generation. A practical solar power generation device can be obtained. Also,
After the snow melts, the heater is turned off, so there is no wasted power consumption.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the solar power generation device of the present invention, and FIG. 2 is a side view of the solar power generation device of the present invention. 1,7...Solar cell, 4...Heater, 5...
control circuit.

Claims (1)

[Scope of utility model registration request] In a solar power generation device comprising a solar cell for power generation, a storage battery charged by the solar cell, a heater disposed close to the solar cell, and a control circuit for controlling energization of the heater, the solar cell and A current detecting means for detecting the charging current is provided between the storage batteries, and a solar cell for the sensor is provided with its light-receiving surface facing downward, and when there is an output from the solar cell for the sensor and the charging current is decreased by the current detecting means. A solar power generation device characterized in that the control circuit energizes the heater when the solar power generation device detects the solar power generation device.